Self-Powered Cable Cooling via Dynamic Power Extraction
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Solution Overview
Problem
Existing cooling systems for power transmission systems are costly and unsafe, particularly when operating at reduced loads, as they require complex installations and can lead to overheating due to inefficient power management.
Innovation Solution
A cooling system that regulates the power fraction extracted from the power transmission cable based on operational parameters, using a transformer to supply the cooling device with maximum or intermediate power depending on the current load, minimizing operational costs and ensuring safe temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cooling system with dedicated power circuits is installed to ensure safe cooling operation, then cooling reliability is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent merges the cooling system's power supply with the existing power transmission infrastructure by extracting power directly from the cable being cooled through electromagnetic induction. This eliminates the need for separate dedicated power circuits and reduces installation complexity while maintaining cooling reliability.
Solution Approach 2:
The cooling system becomes self-powered by extracting energy from the cable it cools. The system uses the cable's own electromagnetic field to generate the power needed for cooling, making it autonomous and eliminating dependence on external power infrastructure.
2Temperature
If maximum power is continuously supplied to the cooling device to ensure adequate cooling, then temperature control is improved, but energy efficiency deteriorates at reduced loads
Solution Approach 1:
The patent implements dynamic power adjustment where the cooling device receives a variable power fraction from the cable based on real-time temperature conditions and load levels. The system transitions from static maximum power supply to dynamic adaptive power supply, optimizing both temperature control and energy efficiency.
Solution Approach 2:
The system changes the power fraction parameter dynamically based on operating conditions. By adjusting the power fraction extracted from the cable according to temperature thresholds and load levels, the system achieves efficient temperature control across varying operational states.
3Adaptability or versatility
If power is extracted from the cable to supply the cooling device, then cooling autonomy is improved, but cable power transmission capacity may be affected
Solution Approach 1:
The patent carefully controls the power fraction extracted from the cable to remain within acceptable limits that do not compromise transmission capacity. By adjusting extraction parameters and monitoring transmission performance, the system achieves cooling autonomy while maintaining adequate power delivery to end users.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively manages heat removal across varying loads, reducing operational costs and ensuring safe temperature control, even at reduced loads, by dynamically adjusting power supply to the cooling device based on current thresholds.
Implementation Method 1
a transformer (T1, T2, T3) coupled with at least one of the cables (C1, C2, C3) and arranged to extract a power fraction from the power transmission system and to supply the cooling device with the extracted power fraction
Implementation Method 2
a cooling device (CD) arranged at a predetermined position of the power transmission system and supplied with the extracted power fraction, the cooling device generating an airflow removing at least part of the heat released by the power transmission system
Implementation Method 3
During operation, a power transmission system is typically subject to heating. Such heating is mostly due to the so-called Joule effect, according to which a current passing through a conductor having a certain resistance produces heat
Data Source
AI summary
A cooling system for cooling a power transmission system that includes a cable configured to carry a current corresponding to a transported electric power may include: a cooling device configured to remove heat from the power transmission system; a power supply system configured to extract a power fraction from the cable and configured to supply the cooling device with the power fraction; and a control unit configured to control an amount of the extracted power fraction in response to a parameter of the electric power. When the parameter is higher than a threshold, the extracted power fraction is equal to a first value that depends on the electric power carried in the cable through a first function. When the parameter is lower than the threshold, the extracted power fraction is equal to a second value that depends on the electric power carried in the cable through a second function.